Frank Says That If You Release the String When Swinging

question 30

Multiple Choice

Frank says that if you release the string when swinging a ball in a horizontal circle, the ball flies out in the radial direction defined by the string at the instant you release the ball. John says that it flies out along a tangent line perpendicular to the string, and that it then drops straight down to the ground. Which one, if either, is correct?

• A) Frank, because the centrifugal force is no longer counteracted by the string.
• B) Frank, because balls naturally fly straight out.
• C) John, because there is no centrifugal force.
• D) John, because balls fall straight down when released.
• E) Neither, because although there is no centrifugal force, and the ball's velocity is tangent to the circle at the instant of release, the ball then follows a parabolic trajectory.

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Definitions:

Program Evaluator

A professional responsible for assessing the effectiveness, quality, and value of programs through systematic methods of data collection and analysis.

Program Analyses

Systematic evaluations of the processes and outcomes of a program to understand its effectiveness, efficiency, and impact.

Program Evaluation

The systematic collection of information about the activities, characteristics, and outcomes of programs to make judgments, improve effectiveness, and/or inform decisions about future programming.

Metaevaluation

The process of evaluating the methods and processes used in an evaluation to assess their accuracy, effectiveness, and quality.